Kubica and Russell are happy to cooperate with each other

Robert Kubica, 71 laps total, best time 1: 39,296
"We focused on the tires for the 2019 season." It was very important to understand the differences and to evaluate what changed. "The tests were conducted under very hot conditions, but the session was very cool. winter and the first races will take place in different temperatures.The last two days, I'm going to sit with the boys and George to choose the tires for the winter tests and the first four laps. a good opportunity to get back to the car, to check the different mixes, but also to warm up the muscles before.Winter will be long and we will prepare for the coming season.I work well with George, it's a boy very kind and we have good contact, which is crucial for us and the team., I look forward to 2019. "

George Russell, 97 laps, the best time 1: 38.802
"I'm very happy with my first try with Williams, it's great to get to know everyone, to understand their work, but it's great to drive a car too, I was pleasantly surprised by the sensations in the car and I think we have taken a few steps forward if that is the 2019 season. The tire tests give a lot to the team, they have gathered a lot of necessary information and this gives a good idea before the first tests and the first races.The work with Robert during the tests was excellent, he has a lot of engineering knowledge thanks to his previous experience.we can have a positive influence and help the team to go into the right direction to improve performance.There is no time to rest in the next few weeks.I'll be very busy participating in Autosport, British Racing Drivers' Club events or Mercedes, a lot of work at Grove with Williams, I have to get ready for the 2019 season so make sure I'm physically ready for testing. "